Analog Devices Inc./Maxim Integrated MAX1227BCEE+

Overview

MAX1227BCEE+ from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±0.7°C accuracy), on-chip 16-entry FIFO, internal 2.5V reference, and SPI/QSPI/MICROWIRE-compatible 3-wire interface. It features 8 single-ended or 4 true differential input channels, operates from a single +3V supply, and targets precision data acquisition in industrial control and patient monitoring systems.

For engineers reviewing the MAX1227BCEE+ datasheet, MAX1227BCEE+ pinout, MAX1227BCEE+ application, or MAX1227BCEE+ equivalent, this page delivers verified specifications, validated QSOP-16 pin mapping, confirmed temperature-sensing performance, real-world use cases in system supervision and instrumentation, and two rigorously cross-checked alternative ADCs for similar multichannel, low-power, FIFO-equipped applications.

Technical Context

The MAX1227BCEE+ employs a fully differential successive-approximation register (SAR) architecture with integrated track-and-hold, supporting both unipolar (0 to VREF) and bipolar (±VREF/2) differential modes as well as single-ended operation referenced to GND. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10.

It integrates an on-chip FIFO buffer that stores up to 16 ADC results plus one temperature reading, enabling burst acquisition without serial bus contention. The internal temperature sensor uses the same 2.5V reference and SAR core, delivering 1/8°C resolution in two's complement format with ±0.7°C accuracy at +25°C.

Key Specifications

Pinout & Package

MAX1227BCEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel, low-power, FIFO-equipped ADC applications.

Compared with ADS7822U and AD7490BRUZ, the MAX1227BCEE+ uniquely integrates FIFO, temperature sensor, and internal reference in a compact 16-pin QSOP-reducing system-level component count, simplifying firmware, and enabling self-thermal-aware data acquisition without external support circuitry.

Availability

MAX1227BCEE+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, automated test equipment, environmental data logging, and system supervision requiring stable component supply across extended temperature ranges.

Supply support for MAX1227BCEE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX1227BCEE+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for space-constrained, low-power systems needing multichannel conversion, autonomous FIFO operation, and on-chip thermal awareness without external support components.

FAQ

What is the operating temperature range for the MAX1227BCEE+?

The MAX1227BCEE+ is specified for operation from 0°C to +70°C, as indicated by the "B" grade and "C" temperature suffix in its ordering code. This commercial-grade rating makes it suitable for indoor industrial and medical instrumentation where ambient conditions remain within this range. The device maintains full 12-bit performance, including ±1 LSB INL/DNL and ±0.7°C temperature accuracy, across this entire span.

Does the MAX1227BCEE+ require an external reference voltage?

No, the MAX1227BCEE+ does not require an external reference voltage-it includes a precision internal 2.5V reference with ±10mV initial accuracy and ±30ppm/°C temperature coefficient. External reference inputs (REF+ and REF−) are optional and used only when higher accuracy or custom full-scale ranges are needed. For most applications, the internal reference simplifies design and reduces component count.

How many analog input channels does the MAX1227BCEE+ support?

The MAX1227BCEE+ supports 8 single-ended analog input channels (AIN0–AIN7) or 4 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.). Channel configuration is software-selectable via the setup register, and pins AIN6 and AIN7 double as REF− and CNVST respectively-functions assigned dynamically at runtime, not fixed by hardware.

Can the MAX1227BCEE+ perform temperature measurements independently of analog conversions?

Yes, the MAX1227BCEE+ can perform standalone temperature measurements without initiating analog channel conversions. Its integrated temperature sensor operates using the internal 2.5V reference and SAR core, producing a 12-bit two's complement result representing temperature in 1/8°C increments. A dedicated bit in the conversion register (TEMP) triggers this function, and the result appears in the FIFO alongside ADC data or alone.

What package type is used for the MAX1227BCEE+?

The MAX1227BCEE+ is supplied in a 16-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch and dimensions of 5.3mm × 10.2mm. The "E" in the suffix denotes the QSOP package, and the "+" indicates RoHS-compliance and lead-free finish. This surface-mount package supports standard reflow soldering and offers robust thermal and electrical performance for dense PCB layouts.